Hooks

Hook	Owns
`useWorkspace`	Accessible boards, active board, roles, bootstrap. Full-page boot only when the board list is empty; detail/prefs hydrate under a kept-alive shell (`surfacePending`).
`useBoardLifecycle`	Owner board CRUD + import/export
`usePlannerRuntime`	Shared composition for Planner + SharedPlanner
`useEventMutations`	Event CRUD API
`useEditorSession`	Draft editor state machine
`useSharedBoard`	Share token load + unlock
`useShareActions`	Share/member mutations + invite
`useBoardPresence`	Instant room presence
`useViewControls`	Filters, labels, visible events
`useTodayTodos`	Derived checklist
`useTheme`	Theme sync
`usePrintSetup`	Print dialog + prefs
`usePlannerClock`	Now line tick
`useMagicCodeAuth`	Email OTP flow
`useMobileSheet`	`max-width: 560px` media

usePlannerRuntime wires clock + mutations + editor + view + presence + print so both shells stay aligned.